If you need help monitoring your cell phone usage, or if you are tired of building up huge cell phone bills, this might be the service for you.

MinuteWatcher is a service that tracks your usage and sends you periodic warnings and forecasts. These give you a chance to adjust your mobile phone usage before you receive a nasty surprise on your phone bill the next month.

This service is FREE and is available to all the major US carriers.

Source: Cell phone minutes monitoring service